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问题 单项选择题

3401G-220侧盖总成在装配密封圈时的装配顺序为（）

A.3401G-222钢垫片、3401G-223橡胶垫片、3401G-225组合密封件、3401G-228卡簧

B.3401G-222钢垫片、3401G-225组合密封件、3401G-223橡胶垫片、3401G-228卡簧

C.3401G-223橡胶垫片、3401G-222钢垫片、3401G-225组合密封件、3401G-228卡簧

D.3401G-223橡胶垫片、3401G-225组合密封件、3401G-222钢垫片、3401G-228卡簧

答案

参考答案：A

阅读理解

Li Ming and Li Tao are twin brothers . They look the same . They’re Chinese . Jim is an English boy . He’s Li Ming and Li Tao’s classmate. He’s twelve years old . His sister’s name is Joy. She is thirteen . They are all in No.12 Middle School .They are good friends .Oh, Jim has a cat . Its name is Kitty. Jim likes it very much.

小题1:Jim and Li Tao are _____________

A. brothers    B. classmate     C. twins

小题2:Joy is ___________.

A. a Chinese girl     B. an English girl     C. an American girl

小题3: How old are the twins?

A. We don’t know.  B. Twelve.  C. Thirteen.

小题4: What does Jim have?

A. A cat named Mimi  B. A cat named Kitty.  C. A bird named Polly.

小题5:Who likes the cat very much?

A. Jim.  B. Joy.  C. Li Ming.
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单项选择题

燃煤电厂主厂房电缆采用架空托架和电缆隧道敷设时，还应采取( )的措施。

A．防水、防潮；
B．防雷击；
C．防辐射；
D．防止煤粉积聚和火灾蔓延。
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